update service not found error tooltip

fixing test failed issue

change back error type
change registry.ErrNotFound back to selector.ErrNotFound

change back error type
change registry.ErrNotFound back to selector.ErrNotFound

remove the single node tunnel test

Fix read yaml config from memory

package main

import (
	"fmt"

	"github.com/micro/go-micro/config"
	"github.com/micro/go-micro/config/source/memory"
)

var configData = []byte(`
---
a: 1234
`)

func main() {
	memorySource := memory.NewSource(
		memory.WithYAML(configData),
	)
	// Create new config
	conf := config.NewConfig()

	// Load file source
	conf.Load(memorySource)

	fmt.Println(string(conf.Bytes()))
}

registry/registry.go

@@ -29,7 +29,7 @@ var (
 	DefaultRegistry = NewRegistry()
 
 	// Not found error when GetService is called
-	ErrNotFound = errors.New("not found")
+	ErrNotFound = errors.New("service not found")
 	// Watcher stopped error when watcher is stopped
 	ErrWatcherStopped = errors.New("watcher stopped")
 )